Humm.... I think I've tried TC with almost all my tanks (excepting K1 and Maxi).
Factory coils:
- VS Nautilus coils are "ok", they seem to work but I've grown beyond the vape the tanks can provide
- VS Atlantis2 and Trition coils worked very well - no issues here other then expense of the coils
- Subtank-Mini Stock Ni coils - I've used a few of these, I'd rate them lower than the VS coils
RTA's:
- STM & STM+ get almost daily use. The old and new RBA is quite usable for TC. I mostly use ether 28 or 30awg Ni200 with 8-10 wraps 2.5-3mm. No real issues here other than sometimes the RBA won't push the center pin down far/hard enough to register on my TC40 (had to toss a stock 0.15 coil in one of my tanks last night to get it to fire). (no leaks that I've found) I have a Black STM+ outfitted with a top fill tank which lives on my TC40.
- Lemo2, I have mine mounted on a SXminiM almost constantly. I normally run a single Ni coil in mine but there's room (and I've tried) dual Ni coils. (I rarely get leaks but sometimes do when stored on its side) I have another Lemo2 on the way which I plan on mounting dual Ni coils on.
- Kanger Subtank, I have two 'clones' which I'm not at all happy with. Dislike the air flow, whistling and the larger RBA seems to take up most of the extra tank capacity. No center pin issues though. (no leaks that I've found) They work fine for TC but get little use because of the other issues and they are bottom fill only.
- Anyvape Sega, top fill and can use Atlantis coils AND has a decent (although small) v2 RBA deck. Works well in TC mode, however seems to seep a little juice when stored on its side. I have one mounted on my IPV4S right now.
- Billow v1, designed for dual coil, non-adjustable air flow, large capacity, can be filled from the top or bottom. I've really tried to like this tank. First tried Ti contact coils and was unable to get the wicking correct to stop 'rattle snaking' while getting 'dry coil' messages, switched to dual spaced Ni coils and different wicking however can't seem to be able to fill it without juice coming out the air holes or store it on its side. (I'm about to give up on this thing)
- Aspire Atlantis2, great airflow, I can vape the tank dry in a matter of a few hours. Not really a RTA except when outfitted with a AnyVape v2 RBA. (not in my daily rotation)
- Aspire Trition, the optional RBA is a joke, YES it can be used in TC but with Ni wire your better off making a verticle coil in there. Weak air flow, leaks. Even with an AnyVape RBA this tank is not in my daily rotation.
Personally I'm leaning towards top fill RTA's which may (or not) have a factory coil option. Wire and cotton is cheap and I usually get 1-2+ weeks use before replacing the coil as I want to try a different build or "just because".